Process of making chafing-blocks for railway rolling-stock.



W. H. SELF.

PROCESS OF MAKING SHAPING BLOCKS FOR RAILWAY ROLLING STOCK.

APPLIOATION FILED SEPT. 20, 1913.

1,1 1 1,807, Patented Sept. 29, 1914. Q

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mum a. saw, or wean-cur, nrssouan raoonss or MAKING cnmno-nnocxsronmnwax nonnme sroox' Specification of Letters Patent. Application medSeptember no, 191:. Serial No. 790,861.

PatentedSept. 29, 1914.

To all whom it may concern:

Be it known that I, WILLIAM H, SELF, a

citizen of the United States of America, and

a resident of Webb City, in the county of Jasper and State of Missouri,have invented certain new and-useful Improvements in Processes of MakingChafing-Blocks I for Railway Rolling-Stock, of which the following is afull, clear, and exact description, reference being had to theaccompanying drawings, forming a part of this specification.

My invention relates to a process of making chafing blocks for railwayrolling stock, the block being one more particularlg intended for usebetween a locomotive an its tender.

Chafing blocks of .the kind to which my invention pertains haveheretofore commonly comprised a block body in the form of acasting and achafing 'plateof hard steel set into and bolted to-thebody block, theabutting faces of the chafing plate and the block body being machined toprovide for the "ac:

curate fitting of the chafing plate into,.th e body block.

My invention has for-its object to provide a chafing block in themanufacture of which the machining of the chafing plate and the blockbody which receives it is dispensed with, and the production of boltholes is also obviated, thereby lessening the expense of production; andit has for a further object the construction of the chafing block,including the chafing plate therein m such manner as to furnish achafing or rubbing element which is much harder and much more durablethan the similar elements in chafing blocks heretofore produced.

Figure I is a front elevation of my chafing block. Fig. II is a verticalcross section taken on line II-II, Fig. I. Fig. III is a horizontalsection taken on line III-III Fi I.

I n the drawings: 1 designates the body of my chafing block, which maybe, and preferablv is, of gray iron, and is provided with bolt holes 2,for the reception of bolts by which the block is secured to the objectintended to receive it. This block contains a pocket 3, in which thechafing plate, to be presently described, lies.

4 designates the chafing plate of my chafing block and 5 are bondsjoining the chafing plate 4 to the body block 1, the said bonds beingpreferably of wrought 11011 and 'duced' chafing plate is lai departingfrom my invention:

being embedded in part in the blockand.

part in the chafing plate. Ihesebonds; are preferably of U-shape, andare shown in the drawings with their bodies present in the bodyjblock 1and their arms present in the .chafin plate 4.

In t e manufacture of my chafing. block,

I first cast the chafing plate 4 inone-mold and thereafter cast the bodyblock 1 in another mold into which the (previously prochafing plate iscast to become embedded in and united with the body block casting, as

will hereinafter more fully appear.

For the production of the chafing plate 4 of a desired degree ofhardness, I preferably utilize a mixture of the following metals in theproportion given, which proportions,

however, may vary to some deg)ree without I pen hearth steel, 47%; ferromanganese, 3%; scrap.-

whereby the.

iron, 40%; charcoal pig iron, 10%. This" mixture of metals is renderedmolten, and is'poured into a suitable mold, inone section jof which thebonds 5 have been previodsly 'set and, as a consequence, the chafingplate 4 is cast with said bonds embedded therein and extending from oneface of the plate. In the mold in which the chafing plate 4 is cast, Iplace a cast iron chill, against which what is to be the wear resistingface of the chafin plate is cast; and, as a result, this face 0 theplate is rendered extremely hard, due to the chilling of the moltenmetal coming in contact with the chill in casting'the plate.

block of my chafing plate is cast, this mold being made in a usualmanner. The previously cast chafing plate a is heated to a dull red heatand placed quickly and properly within the second mold, and said mold isclosed, after which the metal for the formation of the body of thechafing block is I prepare a second mold in which the body I loopextending from the inner face of said soft metal body block.

if .Eu- E cools than would be obtained if the chafing plate casting werenotheated, asspecified; and I, therefore, secure a much more perfectmechanicalunion than would otherwisebe obtainable.

' ,-;'l. -he;bonds 5 entering into the structure of m chafing block areimportant elements,

in that they serve to more eflectually and firmly hold the chafing plateto the body =bloclr ifito which said'plate is cast.

l-claim'z' I 1'. The method :ofmaking chafing blocks which consists incasting a hard metal chaf- "ing' plate onto the ends of a bond member sothat the bond member is in the form of a hard'metal chafing plate, andcasting a soft metal body block. around the side edges and innerfaceo'fsaid hard metal chafing plate so as toembed the loopo'fv said bond inthe 2.. Themethodof making chafing blocks, which consistsin forming ahard metal chafiiig plate', heating said hard metal chafing mold with achill member therein, casting a semi-steel metal against the chillmember and around the ends of substantially U- shaped members to vform achafing late member; cooling the body thus cast; re eatingv same to adull redness; and while, in-tl1is state casting a softer metal on thechafing plate member and about the U-sha ed members, to firmly unite thewhole; an allowing same to cool, substantially as described.

4. The process of manufacturing locomotive chafing plates consistin inproviding a mold with a chill member t erein, casting a metal consistingsubstantially of 47 per cent. open hearth-steel, 3 per cent.ferro-manganese, 40'per cent. scrap cast iron and 10 per cent. charcoalpig iron against the'chill member'and around and embedding the ends ofsubstantially U-shapedmembers to form a chafing plate member; coolingthe body thus cast; reheating same to a dull redness; and while in thisstate casting a softer metal on the chafing plate member and about theU- shaped members; to firmly unite the whole;

and allowing same to (cool, substantially as described. I WILLIA H.SELF.

In the presence of' I J. H. Gwa rnmr,

J. FRANKENBERGER.

